THERMAL SCIENCE

International Scientific Journal

Authors of this Paper

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Xiaozhou Wu

,

Genglin Liu

,

Jie Gao

,

Shuang Wu

IMPACT OF VENTILATION SYSTEM TYPE ON INDOOR THERMAL ENVIRONMENT AND HUMAN THERMAL COMFORT IN A CEILING COOLING ROOM

ABSTRACT
A ceiling cooling (CC) system integrated with a mechanical ventilation system is an advanced HVAC system for the modern office building with glass curtain wall. In this paper, considering the influence of heat transfer of external envelope, the indoor thermal environment and human thermal comfort were objectively measured and subjectively evaluated in a CC room with mixing ventilation (MV) or underfloor air distribution (UFAD). Indoor physical parameters and human skin temperatures were measured as the chilled ceiling surface temperature and supply air temperature were 17.1-17.6℃ and 22.2-22.6℃. Simultaneously, 16 subjects (8 males and 8 females) were selected to subjectively evaluate the thermal environment. The results showed that the difference between mean radiant temperature and air temperature in the occupied zone was 0.8℃ with CC + MV and 1.2℃ with CC +UFAD, and the indoor air velocity was 0.17 m/s with CC + MV and 0.13 m/s with CC + UFAD. In addition, the calculated and measured thermal sensation votes with CC + MV were all slightly less than those with CC + UFAD. Therefore, ventilation system type had a slight impact on the indoor thermal envi¬ronment and human thermal comfort in the CC room.
KEYWORDS
thermal environment, thermal comfort, Ceiling cooling, Mixing ventilation, Underfloor air distribution
PAPER SUBMITTED: 2021-01-08
PAPER REVISED: 2021-08-27
PAPER ACCEPTED: 2021-09-06
PUBLISHED ONLINE: 2021-10-10
DOI REFERENCE: https://doi.org/10.2298/TSCI210108277W
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2022, VOLUME 26, ISSUE Issue 4, PAGES [3271 - 3284]
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Impact of ventilation system type on indoor thermal environment and human thermal comfort in a ceiling cooling room

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence